Tim Samaras, his son Paul Samaras and Carl Young were killed while chasing a tornado in El Reno.

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Longtime storm chasers Tim Samaras, his son Paul and colleague Carl Young were killed Friday when a powerful tornado near El Reno, Okla.

NPR: Storm Chasing Critical, Profitable And Dangerous

Bettes and his crew fared far better than Tim Samaras' team.

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Oklahoma is considered the "mecca of storm chasing, " Tim Samaras told National Geographic just last month, and there are often hundreds of storm chasers lining the roads.

NPR: Storm Chasing Critical, Profitable And Dangerous

"We are deeply saddened by the loss of Tim Samaras, his son Paul and their colleague Carl Young, " a Discovery Channel spokesman said in a statement on the website.

WSJ: 3 'Storm Chasers' Die in Oklahoma Tornado

Tim Samaras founded TWISTEX, the Tactical Weather Instrumented Sampling in Tornadoes Experiment, to help learn more about tornadoes and increase lead time for warnings, according to the official website.

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In a National Geographic interview last month, ahead of a trip father and son would take together, Tim Samaras said Paul was becoming "quite a talented videographer" and joked about how well his team members got to know each other during their days-long pursuits.

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Jim Samaras told The Associated Press on Sunday that his brother Tim was motivated by science.

WSJ: Damaging storms moving through east, south